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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 // | |
| 5 // Mutex to guarantee serialization of RLZ key accesses. | |
| 6 | |
| 7 #include "rlz/win/lib/lib_mutex.h" | |
| 8 | |
| 9 #include <windows.h> | |
| 10 #include <Sddl.h> // For SDDL_REVISION_1, ConvertStringSecurityDescript.. | |
| 11 #include <Aclapi.h> // For SetSecurityInfo | |
| 12 | |
| 13 #include "base/logging.h" | |
| 14 #include "base/win/windows_version.h" | |
| 15 | |
| 16 namespace { | |
| 17 | |
| 18 const wchar_t kMutexName[] = L"{A946A6A9-917E-4949-B9BC-6BADA8C7FD63}"; | |
| 19 | |
| 20 } // namespace anonymous | |
| 21 | |
| 22 namespace rlz_lib { | |
| 23 | |
| 24 // Needed to allow synchronization across integrity levels. | |
| 25 static bool SetObjectToLowIntegrity(HANDLE object, | |
| 26 SE_OBJECT_TYPE type = SE_KERNEL_OBJECT) { | |
| 27 if (base::win::GetVersion() < base::win::VERSION_VISTA) | |
| 28 return true; // Not needed on XP. | |
| 29 | |
| 30 // The LABEL_SECURITY_INFORMATION SDDL SACL to be set for low integrity. | |
| 31 static const wchar_t kLowIntegritySddlSacl[] = L"S:(ML;;NW;;;LW)"; | |
| 32 | |
| 33 bool result = false; | |
| 34 DWORD error = ERROR_SUCCESS; | |
| 35 PSECURITY_DESCRIPTOR security_descriptor = NULL; | |
| 36 PACL sacl = NULL; | |
| 37 BOOL sacl_present = FALSE; | |
| 38 BOOL sacl_defaulted = FALSE; | |
| 39 | |
| 40 if (ConvertStringSecurityDescriptorToSecurityDescriptorW( | |
| 41 kLowIntegritySddlSacl, SDDL_REVISION_1, &security_descriptor, NULL)) { | |
| 42 if (GetSecurityDescriptorSacl(security_descriptor, &sacl_present, | |
| 43 &sacl, &sacl_defaulted)) { | |
| 44 error = SetSecurityInfo(object, type, LABEL_SECURITY_INFORMATION, | |
| 45 NULL, NULL, NULL, sacl); | |
| 46 result = (ERROR_SUCCESS == error); | |
| 47 } | |
| 48 LocalFree(security_descriptor); | |
| 49 } | |
| 50 | |
| 51 return result; | |
| 52 } | |
| 53 | |
| 54 LibMutex::LibMutex() : acquired_(false), mutex_(NULL) { | |
| 55 mutex_ = CreateMutex(NULL, false, kMutexName); | |
| 56 bool result = SetObjectToLowIntegrity(mutex_); | |
| 57 if (result) { | |
| 58 acquired_ = (WAIT_OBJECT_0 == WaitForSingleObject(mutex_, 5000L)); | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 LibMutex::~LibMutex() { | |
| 63 if (acquired_) ReleaseMutex(mutex_); | |
| 64 CloseHandle(mutex_); | |
| 65 } | |
| 66 | |
| 67 } // namespace rlz_lib | |
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Chromium Code Reviews
Issue 10642009:
Add a regenerate button to regenerate the password in Windows. (Closed)
Base URL: http://git.chromium.org/chromium/src.git@master